To read the classical philosophers and even call them great is not the same thing as agreeing with them or following them. The value of (a Christian, especially) being familiar with their work is to be able to have an idea of why (besides the perrenial problem of sin) the world is in the condition is is today. These philosophers and others (like Marx and Sarte) set the groundwork for some of the most influential --and destructive --ideologies of the past century (Marx, Communism and Nietzsche, Nazism) the repucussions of which we still live with today.
Other philosophers in turn laid the groundwork for our modern culture of materialism, practical atheism and relativism. To be familiar with the philosophic under-pinnings of these modern currents better enables us to provide answers to those who are laboring under their errors.
To put a different twist on an old saying, to be ignorant of past errors is to be doomed to repeat them.
Yes, it is important to know what they said, because their philosophies pervade our cultures. To be ignorant of what is driving our culture is to not be able to try and fix it. Here is the “God is dead” quote in broader context (from
Galileo Was Wrong, Sungenis/Bennett):
“Where has God gone?” he cried. “I
shall tell you. We have killed him –
you and I. We are his murderers. But
how have we done this? How were
we able to drink up the sea? Who
gave us the sponge to wipe away the
entire horizon? What did we do when
we unchained the Earth from its sun?
Whither is it moving now? Whither
are we moving now? Away from all
suns? Are we not perpetually falling?
Backward, sideward, forward, in all
directions? Is there any up or down
left? Are we not straying as through
an infinite nothing? Do we not feel
the breath of empty space? Has it not
become colder? Is it not more and
more night coming on all the time?
Must not lanterns be lit in the
morning? Do we not hear anything
yet of the noise of the gravediggers
who are burying God? Do we not
smell anything yet of God’s
decomposition? Gods, too,
decompose. God is dead. God
remains dead. And we have killed
him. How shall we, murderers of all
murderers, console ourselves?”
This article points out where these philosophies lead.